There's lot of accepted sorting algorithms [1]. I'm sure we can come up with novel new algorithms, even if they're not optimal. Like Wikipedia mentions, they all fall within some small number of higher level categories (eg. Partitioning, Merging, Selection, Insertion). I'm still not convinced that the optimizations presented in the article amount to the discovery of NEW sorting algorithms but merely optimizations of existing ones.

[1] https://en.wikipedia.org/wiki/Sorting_algorithm